PROBE::IOSCHEDULER(3stap) IO Scheduler and block IO Taps PROBE::IOSCHEDULER(3stap)

# [NAME](#NAME)

probe::ioscheduler.elv\_add\_request.tp - tracepoint based probe to indicate a request is added to the request queue.

# [SYNOPSIS](#SYNOPSIS)

```
probe ioscheduler.elv_add_request.tp {}
```

# [VALUES](#VALUES)

*elevator\_name*

The type of I/O elevator currently enabled.

*disk\_minor*

Disk minor number of request.

*name*

Name of the probe point

*rq\_flags*

Request flags.

*q*

Pointer to request queue.

*rq*

Address of request.

*disk\_major*

Disk major no of request.

# [SEE ALSO0](#SEE_ALSO0)

[*tapset::ioscheduler*(3stap)](/man/enterprise-packages/systemtap/tapset::ioscheduler.3stap)

September 2026 SystemTap Tapset Reference Ver

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Document: probe::ioscheduler.elv_add_request.tp(3stap) from systemtap 5.6-r0 (Chainguard OS)
Source: https://sourceware.org/git/systemtap.git